Hi everyone! The past summer I made a cross, Awakening Spirit and Lighting Strikes. This cross produced just one seed.

Seed sprouted, germinated, grew a bit. It was planted in past september. Just one leaf and no more than 5 mm. Then one day one of the cat ate it a bit. Put it again in pot, now it's under the LED grow lights. While other seedlings are really growing well this doesn't. The one and only leaf if still few millimeters. Nothing changes. It's getting light fertilizing as the others, it's under the same lights but nothing happens. What would you? I'm starting to think it's not worth the effort.

Can you see a bud at or below the surface of the medium of that seedling? If so it has possibly gone dormant. Not all daylilies or daylily seedlings behave in exactly the same way. I've had a few do that even with bright light. Remind us, how many hours of light are they getting?

Oooopsssssss....
the answer was right there, I went to check for buds and as soon as I touched it the little leaf came apart.. it rotted. No roots apart just one tiny roots I can't really understand if it is still alive or not. I moved and mixed pot soil and let it there in a corner, just to see.
Sorry for this useless thread! And Sue, thanks as always for coming to help me!

The others seedling from my other cross are growing, not so fast but in a month they made progress. They get 12 hours of light per day. Should I give them more? In the basement the potting soil doesn't dry easily, I have to pay attention when giving fertilizer since one is already dead.

I would give them 14 to 16 hours of light, remember that the energy for growth is made by the leaves from light so, all other things being adequate and up to a point, more light equals more growth.

There's looks to be a white powder on the surface of the medium in the picture which could be excess fertilizer salts (although I think you have high mineral water also). With the wide spacing in the pot and the small size of the seedlings, I would be cautious with fertilizer. You might need some if there was none already in the potting media, but it is better to err on the side of too little than too much.

Many thanks for your advice. I will give them more light, and finally I know what that white powder is. I water them with filtered tap water (the same we drink) because the pot is small and is not a big effort. I used half dose of miracle grow, but now I will let the soil dry more and give them only water the next time it will be necessary.

cybersix said:Many thanks for your advice. I will give them more light, and finally I know what that white powder is. I water them with filtered tap water (the same we drink) because the pot is small and is not a big effort.

It's a water jug with a filter in it which reduces the limestone and stops debris. The water here is very alkaline and very dirty, but we don't have a "real softener" we just filter the water we drink. When filtered the ph goes around 7 and there is less limestone (there is still some but not so strong). Is it a problem?

Water that's been through a water softener can be a problem for some plants because of the salt in it, I think that's what Ken was thinking. Some plants are more tolerant of salt than others and it also depends how much salt remains in the water. I imagine your filter doesn't use salt so shouldn't be a problem. We have "hard" water here but I don't bother filtering it for plants. It supplies them with calcium and magnesium which they need and which aren't generally in fertilizers (but are usually added to commercial growing mixes as dolomitic limestone, which lasts for quite a while). Not saying that excessive hard water minerals can't be a problem for some plants, but I would expect them to show signs on the leaves first rather than suddenly dying.